//js vue html css js
// 定义变量
// 变量类型
// number string boolean null undefine
// symbol
// bigint
// 引用数据类型
let username="zahngsan" //defind string
let age = 20 //defind numbic
let flag = false; //boolean false


let func = function(){

}//defind function jave class 属性 method
//定义数组
let userlist = []; // define array
let person


let list2 = {    // {对象}
    address:"jiujiang"
}
list2.username="zhangsan"
list2.age = 30
list2.func=function(){
    console.log("func is running")
}
console.log()



 let list3 ={
    user:[],
    list:list2
 }
console.log(list3.list.age)


console.log(list2,address)









